The relentless rain in Jiangcheng had persisted for months, hiding many troubling issues—Yu Xian began to suspect he was falling ill. Individuals around him were vanishing one after another. A series of strange "smiling suicides" surfaced. His own behaviors and recollections were becoming mismatched. Complete strangers online were experiencing identical dreams, and a university professor met an inexplicable end.…The rainfall only intensified, transforming the vast city into a collection of isolated "islands." Amidst the catastrophic floodwaters, whispers of an "artificial rainstorm" circulated rapidly, hinting at local scientific research institutions as potential culprits. At the same time, a mysterious audio file named The Midnight Bus spread like wildfire across the blackout-affected, disconnected university campus—an audio track capable of pulling anyone who listened into a lucid dream.…Set against the backdrop of an oppressive, unending rainy season, this tale explores the quest to reveal the true essence of the world.